The following data represent a sample of 10 scores on a statistics quiz:

16 16 16 16 16 18 18 20 20 20

After the mean, median, range and variance were calculated for the scores, it was discovered that one of the scores of 20 should have been an 18. Which of the following will change when the calculations are redone using the correct scores?

Which of the following randomly selected measurements, x, might be considered a potential outlier (i.e., an unusual measurement) if it was selected from the given population?

a. x=0 from a population with mu=0 and sigma=2b. x=-5 from a population with mu=1 and sigma=4c. x=7 from a population with mu=3 and sigma=2d. x=4 from a population with mu=0 and sigma=1e. x=10 from a population with mu=0 and sigma=5

Given a distribution of measurements that is approximately mound-shaped, the Empirical Rule states that the approximate percentage of measurements in a data set that fall within two standard deviations of their mean is approximately: